Loading patent…
AssigneeThe Aerospace Corporation
InventorsBernardo Jaduszliwer, Charles M. Klimcak, Gary L. Loper
Estimating the term…
A fiber optic chemical dosimeter system detects the presence of hydrazine fuels and nitrogen tetroxide and nitrogen dioxide gases that are used at rocket launch sites using colorimetric sensors that react selectively with the gases and then absorb laser light communicating through a fiber optic network having a conventional diode laser source transmitting interrogation pulses to a plurality of distributed sensors covering a wide area launch site, the sensor being reactive cladding or distal end types both providing optical reflective returns well suited for reflective near infra-red and visible-red laser interrogation by an optical time domain reflectometry monitor which compares the interrogated laser pulses with sensor returns to determine the extent and location of gas cloud exposures over the distributed wide area.
A sensor for detecting the presence of a hydrazine fuel gas by optical absorption and reflection of an interrogating optical pulse communicated through an optic fiber, said sensor comprises
Dependencies are inferred from the claim text.